diff options
Diffstat (limited to 'libc/stdlib/grantpt.c')
| -rw-r--r-- | libc/stdlib/grantpt.c | 26 |
1 files changed, 18 insertions, 8 deletions
diff --git a/libc/stdlib/grantpt.c b/libc/stdlib/grantpt.c index 7aa49fcd5..d49f0af4f 100644 --- a/libc/stdlib/grantpt.c +++ b/libc/stdlib/grantpt.c @@ -18,6 +18,11 @@ #include <limits.h> #include <stdlib.h> + +/* If ASSUME_DEVPTS is defined, grantpt() reduces to a stub since we + assume that the devfs/devpts filesystem automatically manages the + permissions. */ +#if !defined ASSUME_DEVPTS #include <sys/statfs.h> /* Constant that identifies the `devpts' filesystem. */ @@ -34,18 +39,21 @@ int __unix_grantpt (int fd); pseudo terminal in a safe way. */ static int pts_name (int fd, char **pts, size_t buf_len); +#endif + /* Change the ownership and access permission of the slave pseudo terminal associated with the master pseudo terminal specified by FD. */ int grantpt (int fd) { +#if !defined ASSUME_DEVPTS struct statfs fsbuf; -#ifdef PATH_MAX +# ifdef PATH_MAX char _buf[PATH_MAX]; -#else +# else char _buf[512]; -#endif +# endif char *buf = _buf; if (pts_name (fd, &buf, sizeof (_buf))) @@ -56,11 +64,13 @@ grantpt (int fd) /* If the slave pseudo terminal lives on a `devpts' filesystem, the ownership and access permission are already set. */ - if (fsbuf.f_type == DEVPTS_SUPER_MAGIC || fsbuf.f_type == DEVFS_SUPER_MAGIC) - return 0; - + if (fsbuf.f_type != DEVPTS_SUPER_MAGIC && fsbuf.f_type != DEVFS_SUPER_MAGIC) return __unix_grantpt (fd); +#endif + return 0; } -#define grantpt __unix_grantpt -#include "unix_grantpt.c" +#if !defined ASSUME_DEVPTS +# define grantpt __unix_grantpt +# include "unix_grantpt.c" +#endif |